Frost dates for Choke Canyon Dam, TX
At Choke Canyon Dam, the median last spring frost (32°F) is Feb 8 and the median first fall frost is Dec 6, for a typical growing season of 302 days. For a 90% chance that the last frost has passed, wait until Mar 8. Nearby ZIP codes are in USDA hardiness zones 9a to 9b.
- Feb 8Last spring frost (median)50% chance of 32°F after this date
- Mar 8Safer planting date10% chance of 32°F after this date
- Dec 6First fall frost (median)50% chance of 32°F by this date
- 302 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Feb 2 | Feb 28 | Mar 24 |
| 32°F | Jan 1 | Feb 8 | Mar 8 |
| 28°F | Dec 16 | Jan 23 | Feb 28 |
| 24°F | Dec 13 | Jan 10 | Feb 15 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Nov 5 | Nov 24 | Dec 14 |
| 32°F | Nov 17 | Dec 6 | Jan 6 |
| 28°F | Nov 28 | Dec 25 | Feb 1 |
| 24°F | Dec 6 | Jan 2 | Feb 9 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 241 days | 270 days | 302 days |
| 32°F | 268 days | 302 days | 341 days |
| 28°F | 295 days | 337 days | 365 days |
| 24°F | 327 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 99% |
| 28°F | 78% |
| 24°F | 40% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 78071 | 9a | 20 to 25°F | 5 km |
| 78075 | 9a | 20 to 25°F | 14 km |
| 78022 | 9b | 25 to 30°F | 27 km |
| 78008 | 9a | 20 to 25°F | 29 km |
| 78062 | 9a | 20 to 25°F | 32 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USC00411720, at 28.4675, -98.2525, elevation 70 m (230 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 9.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Calliham (10 km)
- Tilden 4 SSE (28 km)
- Cross (33 km)
- Beeville 5 NE (53 km)
- Fowlerton (57 km)
- Pleasanton (59 km)
- Mathis 4 SSW (61 km)
- Karnes City 2n (61 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.